Hiro, T., Tomioka, T., Ishii, T., Kobayashi, F., & Yamamoto, T. (1997). The characteristic of H-shape sport's mouth guard on athlete's physical capacity. Effects on shock absorbability and respiratory function. Japanese journal of physical fitness and sports medicine, 46(3), S. 297-303.

Hiro, T., T. Tomioka, T. Ishii, F. Kobayashi, and T. Yamamoto. "The characteristic of H-shape sport's mouth guard on athlete's physical capacity. Effects on shock absorbability and respiratory function." Japanese journal of physical fitness and sports medicine 46, no. 3 (1997): S. 297-303.

Hiro, T., et al. "The characteristic of H-shape sport's mouth guard on athlete's physical capacity. Effects on shock absorbability and respiratory function." Japanese journal of physical fitness and sports medicine 46.3 (1997): S. 297-303.